A standby 10kva generator is a backup electrical system that operates automatically, within seconds of an outage an automatic transfer switch (ATS) senses the power loss and starts the generator. This can be paired with a UPS system to ensure the load isn't dropped at all, not even for a second.10 kVA / 10,000 Watt Power Conditioner, Voltage Regulator, & Battery Backup UPS With Built In Isolation Transformer.